Knife-polishing apparatus.



W. H. BARNES.

- KNIFE POLISHING APPARATUS.

APPLICATION FILED FEB.H,1915.

Patented June 29, 1915.

WILLIAM HENRY BARNES, 01? MANCHESTER, 3ELTGrJLAlWDv KNIFE-POLISHING: APPARATUS.

Specification of Letters Patent.

Patented June 2? 1915,

Application filed. February 11, 1915. Serial No. 7,625.

To all whom it may concern. 1

Be it known that I, WILLIAM HENRY BARNES, a subject of the King of Great Britain, residing at Midland House, 271 Great Ancoats street, Manchester, in the county of Lancaster, England, engineer, have in vented new and useful Improvements in and Relating to Knife-Polishing Apparatus and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has reference to improvements in and relating to knife polishing apparatus and has for its objects and effects to i provide an apparatus for use in polishing knives which shall be compact, clean, cheap to manufacture and use, and eiiioient.

The invention is set forth in the following description which is made in connection with the accompanying drawings, in which lower box "a The bottom the invention is shown.

Figure 1 is a vertical section of the apparatus and Fig. 2 is a plan of the apparatus with the lid of the upper casing removed.

The invention essentially comprises a base board a for securing to a table or the like and on to this is detachably secured a boxlike structure I) which is hollow and open at one end 0 into a chamber d which latter projects from one end of the box 6 so as to allow for a knife of considerable length to be polished, without being brought up against the end.

The top I) of the box 6 is of wood or the like covered with felt or similar material, which has a central hole 6 therein leading to the interior of the box I) and passages spaced from the hole 6 A further box 6 is adapted to fit onto and be held in position say by resilient bands f, to the top of the of which has a hole Z9 in alinement with hole 6 and smaller ones I). This box 6 has a lid 9 for filling the box 6 with polishing powder and has also a tube It fitted in the hole 6 in the bottom so as to allow the powder to pass through again from b when the lower box is full. It has also a projecting ledge of pol-' ishing material 6 for cleaning the shoulder of the knife. The felt or the like on the top of the bottom box 6 and on the bottom of the top box 6 projects at the upper end and forms lips 7' which serve to indicate the opening for the knife is to allow the same to be cleaned right up to the shoulder, and a piece of felt or the like attached to the upper part of a projecting portion is effectually keeps all polishing powder from escaping during the backward and forward motion, and insures the knife being withdrawn quite clean and free from powder. The opening for the knife is is surrounded by the projecting portion 70 as is likewise an opening 7: in the end of the lower box 6 so as to shoot back into the interior of the box Z) any powder wiped off the knife on the aforesaid projection k.

The action is as follows: The upper box 6 is fixed in place on the box I) and is held firmly yet resiliently in place by the resilient bands The box 6 is then charged with polishing powder which passes through the holes 32*. The knife is then pushed in between thelips j and moved backward and forward till polished, the powder as used passing through the holes in the top 6' of the box Z) and also down slots at the side of the top 6'. When the knife is polished, it is withdrawn clean right up to the shoulder and it is then finally rubbed on the ledge c for finishing off. When all the powder has passed through from the upper box 6 to the lower one 6 the whole is detached from the base and turned upside down so as to allow it to return to the box 6 by way of opening 6 and the tube It. By this means one supply of powder will last for an indefinite period as it may be used over and over again.

Owing to the arrangement of resilient bands f holding the boxes together, a constant and uniform pressure is maintained on the knife being polished thus insuring an efficient polishing surface and pressure being available at all times.

What I do claim as my invention, and desire to secure by Letters Patent is 1. A knife polishing device comprising a pairof superposed independent casings the respective top and bottom of which constitute polishing surfaces and are provided with openings respectively whereby the polishing material will. pass from the interior of the top casing to the interior of the bottom casing, means for yieldingly holding the casings together, an means for effecting delivery of the polishing material in bulk from the bottom casing to the top casing when the positions of the casings are reversed.

2. A knife polishing device comprising a pair of superposed independent casings the respective top and bottom of-Which constitute polishing surfaces and are provided With registering openings and "further provided With openings disposed out of registration, a tubular member mounted in the registering opening of the upper casingand projecting into the latter a predetermined distance, and means foryieldingly holding the casings together.

3. A knife polishing device-comprising a pair of superposed independent casings the respective top and bottom of which c0nsti tute polishing surfaces, means for yieldingly holding the casings together, means exteriorly of and at one end of the casings for Wiping the polishing material from aknife, and a chute for catching such material and directing same to the interior ofthe lower casing.

In testimony whereof I have signed my name to this specification in thepresence of Copies of this'patent may be obtained for five cents each, by addressing the "Ofom'missioner of Batents,

Washington, D. G. 1 

